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ed
2026-06-02 01:34:54 -04:00
parent bcb9d9a77c
commit 0573644494
3 changed files with 19 additions and 39 deletions
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code/duffle/dsl.h
-18
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@@ -30,24 +30,6 @@
#define asm __asm__
#define align_(value) __attribute__((aligned (value))) // for easy alignment
/* reg_str(n) — Stringify an integer register id into the GCC asm
* string form (e.g. 12 → "$12"). Use this anywhere GCC's parser
* expects a literal string identifying a register: clobber lists,
* asm templates, etc. The two-level macro is the standard preprocessor
* idiom for forcing one level of expansion before stringify — without
* it, `#n` would stringify the macro name `R_T4` to `"R_T4"` instead
* of expanding `R_T4` to its value first.
*
* For declaring a register variable bound to a specific GPR, use the
* `rgcc(n)` bundle from gcc_asm.h instead — it adds the `__asm__()`
* qualifier around the string.
*
* register V3_S2* p0 __asm__(reg_str(R_T4)) = ...; // verbose
* register V3_S2* p0 rgcc(R_T4) = ...; // bundled
*
* asm volatile("nop" : : : reg_str(R_RA), "memory"); // clobber list */
#define reg_str_(n) "$" #n
#define reg_str(n) reg_str_(n)
#define align_(value) __attribute__((aligned (value))) // for easy alignment
#define C_(type,data) ((type)(data)) // for enforced precedence
#define expect_(x, y) __builtin_expect(x, y) // so compiler knows the common path